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Amphibians Amphibians

Amphibians are ecologically important in most freshwater and terrestrial habitats in the United States: they can be numerous, function as both predators and prey, and constitute great biomass. Amphibians have certain physiological (e.g., permeable skin) and ecological (e.g., complex life cycle) traits that could justify their use as bioindicators of environmental health. For example...
Authors
R. Bruce Bury, P. Stephen Corn, C. Kenneth Dodd, Roy W. McDiarmid, Norman J. Scott

Reef fishes of the Florida Keys Reef fishes of the Florida Keys

The Florida Keys are a chain of islands extending 320 km (199 mi) along the southern edge of the Florida Plateau from Biscayne Bay to the Dry Tortugas (101 km [63 mi] west of Key West). The Florida Reef Tract, a band of living coral reefs paralleling the Keys, extends from Fowey Rocks to the Marquesas and includes about 130 km (81 mi) of bank reefs and 6,000 patch reefs. For convenience...
Authors
William F. Smith-Vaniz, James A. Bohnsack, James D. Williams

Can Dugongs Survive in Palau? Can Dugongs Survive in Palau?

In August 1991 we surveyed dugongs Dugong dugon in the coastal waters of Palau using methods similar to aerial surveys conducted in 1977, 1978 and 1983. Twenty-six dugongs (including four calves) were seen, a count within the range obtained previously. The rate at which dugongs were seen per unit flight-time was lower than for any of the other surveys, despite the observers being more...
Authors
H. Marsh, G. B. Rathbun, T. J. O'Shea, A.R. Preen

Trends and patterns in mortality of manatees in Florida, 1974-1991 Trends and patterns in mortality of manatees in Florida, 1974-1991

Abstract not supplied at this time
Authors
B.B. Ackerman, S.D. Wright, R. K. Bonde, D.K. Odell, D.J. Banowetz

Nonindigenous fish Nonindigenous fish

Abstract not supplied at this time
Authors
C.P. Boydstun, P.L. Fuller, J.D. Williams

Estimation of survival of adult Florida manatees in the Crystal River, at Blue Spring, and on the Atlantic Coast Estimation of survival of adult Florida manatees in the Crystal River, at Blue Spring, and on the Atlantic Coast

We applied Cormack-Jolly-Seber open population models to manatee (Trichechus manatus latirostris) photo-identification databases to estimate adult survival probabilities. The computer programs JOLLY and RECAPCO were used to estimate survival of 677 individuals in three study areas: Crystal River (winters 1977-78 to 1990-91), Blue Spring (winters 1977-78 to 1990-91), and the Atlantic...
Authors
Thomas J. O'Shea, Catherine A. Langtimm

Organochlorine residues in bat guano from nine Mexican caves, 1991 Organochlorine residues in bat guano from nine Mexican caves, 1991

Samples of bat guano, primarily from Mexican free-tailed bats (Tadarida brasiliensis), were collected at nine bat roosts in caves in northern and eastern Mexico and analysed for organochlorine residues. DDE, the most abundant residue found in each cave, was highest (0.99 p.p.m. dry weight) at Ojuela Cave, Durango. Other studies of DDE in bat guano indicate that this concentration is too...
Authors
D. R. Clark, A. Moreno-Valdez, M.A. Mora
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